Observing Precipitation through Dual-Polarization Radar Measurements
Observing Precipitation through Dual-Polarization Radar Measurements
复制标题
通过双偏振雷达测量观测降水
DOI：
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发表时间：
1992
期刊：
影响因子：
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通讯作者：
A. R. Jameson
中科院分区：
文献类型：
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作者：
P. Herzegh;A. R. Jameson
双偏振雷达降水测量主要受散射水凝物的大小、形状、方向和相位的影响。因此，这些测量可以作为远程识别水凝物特征的工具。本文概述了差动反射率 (ZDR) 和线性消偏比 (LDR) 测量的定义、观测值和应用。针对广泛的层状降水、快速发展的对流单元和严重的冰雹，给出了这些测量的简要示例。结果概述了 ZDR 在区分降雨和固体降水、识别 0°C 以上的过冷雨滴以及识别地表冰雹方面发挥的作用。 LDR 测量可以揭示冰颗粒形状、方向和颗粒相的对比。这些对比对于描绘高空冰雹区域和识别混合相颗粒颗粒特别有益...
Dual-polarization radar measurements of precipitation are primarily influenced by the size, shape, orientation, and phase of scattering hydrometeors. As a result, these measurements can serve as a tool for remote identification of hydrometeor characteristics. This paper presents an overview of the definitions, observed values, and applications of differential reflectivity (ZDR) and linear depolarization ratio (LDR) measurements. Brief examples of these measurements are given for widespread stratiform precipitation, a rapidly developing convective cell, and a severe hailstorm. The results outline the role that ZDR can play in the differentiation of rain and solid precipitation, identification of supercooled raindrops above the 0°C level, and identification of hail at the surface. LDR measurements are seen to reveal contrasts in ice-particle shape, orientation, and particle phase. These contrasts are of particular benefit toward delineation of hail regions aloft and identification of mixed-phase particle gr...